For those who have missed the Kamen Rider with a troll face, worry no more as he will be lending his voice for Zyuohger earlier in the series.
Kohei Murakami, better known as Kusaka Masato/Kamen Rider Kaixa from Kamen Rider 555 will be voicing an avian zyuman that will be giving Yamato his King's Credential Cube.

Wonder if I'm the only one that finds that this guy looks like Jim Carey. ( http://static1.gamespot.com/uploads/original/1556/15562761/2923036-6921351345-Jim-C.jpg ). Obviously a more Asian Jim Carrey, but I'm just saying.